Attorney General Jeff Sessions should be invited to testify before the Senate Judiciary Committee following a report in The Washington Post he had "substantive discussions" with Russian ambassador Sergey Kislyak about President Donald Trump's policy positions, Sen. Dianne Feinstein said Monday in a letter to the committee's chairman.

She said the Post's report, if true, "would be directly contrary to the testimony that Attorney General Jeff Sessions gave — under oath — before the Judiciary Committee during his confirmation hearings."

Sessions during the hearings failed to disclose his interactions with Kislyak but former and current U.S. officials told the Post he discussed campaign-related matters, including policy issues important to Russia, with the ambassador. He later said the meetings had nothing to do with the Trump campaign.

Feinstein, in her letter, said it would be a "grave breach of trust" if Sessions gave false information, especially since he "holds a unique position of trust within our government, is charged with defending the Constitution, and serves as the nation's chief law enforcement officer."

Attorney General Jeff Sessions should be invited to testify before the Senate Judiciary Committee following a report in The Washington Post he had "substantive discussions" with Russian ambassador Sergey Kislyak about President Donald Trump's policy positions, Sen. Dianne Feinstein said Monday.